From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62731C33CAD for ; Mon, 13 Jan 2020 12:24:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3308F21739 for ; Mon, 13 Jan 2020 12:24:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727494AbgAMMYL (ORCPT ); Mon, 13 Jan 2020 07:24:11 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:44977 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726985AbgAMMYL (ORCPT ); Mon, 13 Jan 2020 07:24:11 -0500 Received: by mail-io1-f69.google.com with SMTP id t17so5638138ioi.11 for ; Mon, 13 Jan 2020 04:24:11 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=ZuZRhQ+jPRZsTrygyPZS020fG6PnWHGjylEin+kRBcw=; b=A9j9Rh2sYajZg+CLuvaThWhQMfM5yEvFu21WFlNLCeccSZHu5eXS5y0VPfIuREjU+R HTUJ9qkLgif5zFygng+6aDchMQb4+r0gWCg5ueC62iredBQPSVT0szpjzpvGoFnhTvED psO4c0v2D2VT4HTQUvbj2zctf6+VzsGUwJ+VCN+jM6K1oGZq0AP9IQH6fY+YeNSDETRU 7EAlUQjzibA4hMrPEPYq9rNg0jtid8xrRVMtQhMIbcjCJ6FqqqK1ZjWNF/6iykYomgyf B+6uRGvHNkvek0ign6DHI1NhIUMd1rGbK/Ko15BEeiONn3+nkGk01QIBwkAj4cA6wbQ8 DS/A== X-Gm-Message-State: APjAAAUD1FqFcFTmChJt7rGjhtNSmJsNOwe+FoYxBdUPzQ+a6eGlVH90 HbytBvL5WL1zwAji1pASN2dTsYiZv3MGkzPx+/lxCJLWkslG X-Google-Smtp-Source: APXvYqx1EwJ3DiSlzRJzQV8GGofGcpkpYo31yVBIPnc8AL5HZO2LokysvBczZEsW1mPeY9dM0wEt78oIY2atH+hmLkbuhw9lQZaB MIME-Version: 1.0 X-Received: by 2002:a5e:8345:: with SMTP id y5mr11788158iom.122.1578918250807; Mon, 13 Jan 2020 04:24:10 -0800 (PST) Date: Mon, 13 Jan 2020 04:24:10 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000780999059c048dfc@google.com> Subject: KASAN: use-after-free Read in uvc_probe From: syzbot To: andreyknvl@google.com, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, linux-usb@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: ae179410 usb: gadget: add raw-gadget interface git tree: https://github.com/google/kasan.git usb-fuzzer console output: https://syzkaller.appspot.com/x/log.txt?x=132223fee00000 kernel config: https://syzkaller.appspot.com/x/.config?x=ad1d751a3a72ae57 dashboard link: https://syzkaller.appspot.com/bug?extid=9a48339b077c5a80b869 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16857325e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142e069ee00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9a48339b077c5a80b869@syzkaller.appspotmail.com usb 1-1: New USB device found, idVendor=0bd3, idProduct=0555, bcdDevice=69.6a usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: string descriptor 0 read error: -71 uvcvideo: Found UVC 0.00 device (0bd3:0555) ================================================================== BUG: KASAN: use-after-free in uvc_register_terms drivers/media/usb/uvc/uvc_driver.c:2038 [inline] BUG: KASAN: use-after-free in uvc_register_chains drivers/media/usb/uvc/uvc_driver.c:2070 [inline] BUG: KASAN: use-after-free in uvc_probe.cold+0x2193/0x29de drivers/media/usb/uvc/uvc_driver.c:2201 Read of size 2 at addr ffff8881d4f1bc2e by task kworker/1:2/94 CPU: 1 PID: 94 Comm: kworker/1:2 Not tainted 5.5.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xef/0x16e lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd3/0x314 mm/kasan/report.c:374 __kasan_report.cold+0x37/0x85 mm/kasan/report.c:506 kasan_report+0xe/0x20 mm/kasan/common.c:639 uvc_register_terms drivers/media/usb/uvc/uvc_driver.c:2038 [inline] uvc_register_chains drivers/media/usb/uvc/uvc_driver.c:2070 [inline] uvc_probe.cold+0x2193/0x29de drivers/media/usb/uvc/uvc_driver.c:2201 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:361 really_probe+0x290/0xad0 drivers/base/dd.c:548 driver_probe_device+0x223/0x350 drivers/base/dd.c:721 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x390 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_set_configuration+0xe47/0x17d0 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0xaf/0x140 drivers/usb/core/driver.c:266 really_probe+0x290/0xad0 drivers/base/dd.c:548 driver_probe_device+0x223/0x350 drivers/base/dd.c:721 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x390 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2537 hub_port_connect drivers/usb/core/hub.c:5184 [inline] hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] port_event drivers/usb/core/hub.c:5470 [inline] hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5552 process_one_work+0x945/0x15c0 kernel/workqueue.c:2264 worker_thread+0x96/0xe20 kernel/workqueue.c:2410 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Allocated by task 94: save_stack+0x1b/0x80 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:486 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:670 [inline] uvc_alloc_chain+0x48/0xfa drivers/media/usb/uvc/uvc_driver.c:1692 uvc_scan_device drivers/media/usb/uvc/uvc_driver.c:1818 [inline] uvc_probe.cold+0x15f0/0x29de drivers/media/usb/uvc/uvc_driver.c:2197 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:361 really_probe+0x290/0xad0 drivers/base/dd.c:548 driver_probe_device+0x223/0x350 drivers/base/dd.c:721 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x390 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_set_configuration+0xe47/0x17d0 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0xaf/0x140 drivers/usb/core/driver.c:266 really_probe+0x290/0xad0 drivers/base/dd.c:548 driver_probe_device+0x223/0x350 drivers/base/dd.c:721 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x390 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2537 hub_port_connect drivers/usb/core/hub.c:5184 [inline] hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] port_event drivers/usb/core/hub.c:5470 [inline] hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5552 process_one_work+0x945/0x15c0 kernel/workqueue.c:2264 worker_thread+0x96/0xe20 kernel/workqueue.c:2410 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Freed by task 94: save_stack+0x1b/0x80 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x117/0x160 mm/kasan/common.c:474 slab_free_hook mm/slub.c:1425 [inline] slab_free_freelist_hook mm/slub.c:1458 [inline] slab_free mm/slub.c:3005 [inline] kfree+0xd5/0x300 mm/slub.c:3957 uvc_scan_device drivers/media/usb/uvc/uvc_driver.c:1825 [inline] uvc_probe.cold+0x16fd/0x29de drivers/media/usb/uvc/uvc_driver.c:2197 usb_probe_interface+0x310/0x800 drivers/usb/core/driver.c:361 really_probe+0x290/0xad0 drivers/base/dd.c:548 driver_probe_device+0x223/0x350 drivers/base/dd.c:721 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x390 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_set_configuration+0xe47/0x17d0 drivers/usb/core/message.c:2023 generic_probe+0x9d/0xd5 drivers/usb/core/generic.c:210 usb_probe_device+0xaf/0x140 drivers/usb/core/driver.c:266 really_probe+0x290/0xad0 drivers/base/dd.c:548 driver_probe_device+0x223/0x350 drivers/base/dd.c:721 __device_attach_driver+0x1d1/0x290 drivers/base/dd.c:828 bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:430 __device_attach+0x217/0x390 drivers/base/dd.c:894 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:490 device_add+0x1459/0x1bf0 drivers/base/core.c:2487 usb_new_device.cold+0x540/0xcd0 drivers/usb/core/hub.c:2537 hub_port_connect drivers/usb/core/hub.c:5184 [inline] hub_port_connect_change drivers/usb/core/hub.c:5324 [inline] port_event drivers/usb/core/hub.c:5470 [inline] hub_event+0x21cb/0x4300 drivers/usb/core/hub.c:5552 process_one_work+0x945/0x15c0 kernel/workqueue.c:2264 worker_thread+0x96/0xe20 kernel/workqueue.c:2410 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 The buggy address belongs to the object at ffff8881d4f1bc00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 46 bytes inside of 256-byte region [ffff8881d4f1bc00, ffff8881d4f1bd00) The buggy address belongs to the page: page:ffffea000753c680 refcount:1 mapcount:0 mapping:ffff8881da002780 index:0x0 compound_mapcount: 0 raw: 0200000000010200 ffffea000753c600 0000000300000003 ffff8881da002780 raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8881d4f1bb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8881d4f1bb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc > ffff8881d4f1bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8881d4f1bc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8881d4f1bd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches